Method, system and device for data access based on CDN network

The invention provides a method, a system and a device for data access based on a CDN network. The method comprises the following steps: a proxy CDN node receives a first data access message of a client; the proxy CDN node generates a plurality of second data access messages according to the first data access message; the proxy CDN node sends the second data access messages to a source station through a plurality of paths; and the proxy CDN node forwards a first-returned response message in the plurality of paths to the client. According to the proxy CDN node in the embodiment of the invention, the plurality of paths selected by the proxy CDN node enable the proxy CDN node to receive the first-returned response message and send the first-returned response message to the client. Therefore, even if one path is blocked, access of the client is not affected, thus improving the access speed of the client.